PRUSA edition heat break easily jam/clog with PLA  

RE: PRUSA edition heat break easily jam/clog with PLA

@bobstro

No. It does not. I’m getting the same end-melt jam as everyone in the forum is describing. It seems like heat creep from the nozzle. Causing the PLA to soften too early.

RE: PRUSA edition heat break easily jam/clog with PLA

My issues with every time jamming during long lasting prints (20-30h) with PLA, especially ones containing long series of quick retractions over little details of the model were solved by arming hotend with regular E3D heatbreak and later rebuilding whole extruder into Skelestruder. Resolving two suspected reasons which were unusual shape of Prusa edition heatbreak and heat creep from the extruder motor getting scorching hot.

So far do not experienced more weird jams, beside maybe one but this one was case of wearing PTFE tube debris getting into the nozzle. So in my case switching heatbreak and then modding the extruder indeed resolved this issue.

RE: PRUSA edition heat break easily jam/clog with PLA

If anybody is interested, I've tried to compile all the problems and fixes into my Mk3 notes. I'm still consolidating things and there is some redundancy, but most issues are listed along with possible fixes.

RE: PRUSA edition heat break easily jam/clog with PLA

@bobstro

This is a very nice guide! Thank You for keeping and sharing it!

RE: PRUSA edition heat break easily jam/clog with PLA

Is there any official response from Prusa on this?  I just measured the end of a pull at 2.2mm on my brand new mk3s+ so this still appears to be an issue.  I have not had this problem with Prusament PLA or PETG from any brand, but I've had this happen with budget filaments from Bing3D and GST3D.  Is there a good budget PLA brand in the states that is reliable with the stock mk3s setup?

Issue seems to be most prevalent on models with lots of quick retractions like others have mentioned.  Printing hotter and faster with less retraction length seems to alleviate the issue for me.  I may have to try and stick with printing more PETG and one of these days I'll just upgrade to a Dragon hotend or something without this 2.2mm throat.

RE: PRUSA edition heat break easily jam/clog with PLA

Does anyone have a copy of @Antimix ‘s original PDF with all the details? The attachment seems to have been removed

RE: PRUSA edition heat break easily jam/clog with PLA

Do you have a link to the post with the PDF?

Posted by: @sprakle

Does anyone have a copy of @Antimix ‘s original PDF with all the details? The attachment seems to have been removed

RE: PRUSA edition heat break easily jam/clog with PLA

The very first post: https://forum.prusa3d.com/forum/original-prusa-i3-mk3s-mk3-hardware-firmware-and-software-help/prusa-edition-heat-break-easily-jam-clog-with-pla/

> To explain better the issue I prepared a PDF document with detailed drawings, schemes, and photos, that you will find attached. 

Posted by: @cwbullet

Do you have a link to the post with the PDF?

 

RE: PRUSA edition heat break easily jam/clog with PLA

Hello,

here it is again the PDF -Filament Clog

Cheers.

RE: PRUSA edition heat break easily jam/clog with PLA

Ive just ordered a MK3s+ ... should I buy the MK2 Heat brake or a titanium one as I expect to be printing mostly mono colour and PLA or PETG. I live in Australia and we have fairly high ambient temps.

I'm surprised that PRUSA which I arrived at based on all of teh "Premium" / "Amazing support" testimonials , is still silent on this after 3 years.  That is a really bad look!

RE:

I ordered the E3D V6-175-Break and have used PLA, PETG, and TPU with 0 issues (been using over a year). 

Genuine E3D V6 Heat Break (1.75mm) (V6-175-BREAK) https://www.amazon.com/dp/B077Y2MHW8/

RE:

Thanks for the link. I was hoping to buy as part of my prusa order - prusa store is only selling the proprietary version now with the 2.2mm tube?

if I’m building my kit and change the heartbreak do I need different size ptfe tube as well?

im glad I’ve been pre reading. As a novice user technical design hiccups can be a showstopper if they intimidate through multiple failure events. 

has anyone asked Joseph about this at an open question forum? Communication with a community is so so important with open source platforms. Genuine problems raised aren’t always “toxic” or “aggressive” undermining (I’ve seen a few very defensive prusa posts on reddit)

RE: PRUSA edition heat break easily jam/clog with PLA

I was getting a lot of jams last year and changed two things.

1) I was switching the printer off without letting it cool down first. That immediately stops the cooling, the heat then transfers up into the heatbreak causing the filament to melt which I did not notice until the next time I used the printer. Now I always set the printer to cooldown and don't turn it off until below 70c.

2) I was unloading the filament at different stages of heating.  Now I always let it heat up, push out some filament to check it's running cleanly and then unload. 

Alex

RE: PRUSA edition heat break easily jam/clog with PLA

Posted by: @nzxela

1) I was switching the printer off without letting it cool down first. That immediately stops the cooling, the heat then transfers up into the heatbreak causing the filament to melt which I did not notice until the next time I used the printer. Now I always set the printer to cooldown and don't turn it off until below 70c.

I don't think that is the answer.  I have been printing for over 3 years and have 13 Prusa printers.   I have never experienced that to be the problem.  

RE: PRUSA edition heat break easily jam/clog with PLA

Other than E3D options, does one like this seem ok to buy and use?

https://www.amazon.com/Titanium-Thermal-Feeding-Heatbreak-Extruder/dp/B07K2QWJKY/ref=cm_cr_arp_d_pb_opt?ie=UTF8

RE: PRUSA edition heat break easily jam/clog with PLA

Posted by: @mgrobins

Other than E3D options, does one like this seem ok to buy and use?

https://www.amazon.com/Titanium-Thermal-Feeding-Heatbreak-Extruder/dp/B07K2QWJKY/ref=cm_cr_arp_d_pb_opt?ie=UTF8

I have tested and used these and they will work.  

RE: PRUSA edition heat break easily jam/clog with PLA

Posted by: @cwbullet

 

Posted by: @mgrobins

Other than E3D options, does one like this seem ok to buy and use?

https://www.amazon.com/Titanium-Thermal-Feeding-Heatbreak-Extruder/dp/B07K2QWJKY/ref=cm_cr_arp_d_pb_opt?ie=UTF8

I have tested and used these and they will work.  

Hardly a ringing endorsement 🤔

they worked as well as e3d… better or worse? 

RE: PRUSA edition heat break easily jam/clog with PLA

They work as well as E3D but are not superior.  Fort the price, it is worth the purchase.  

Posted by: @mgrobins

 

Posted by: @cwbullet

 

Posted by: @mgrobins

Other than E3D options, does one like this seem ok to buy and use?

https://www.amazon.com/Titanium-Thermal-Feeding-Heatbreak-Extruder/dp/B07K2QWJKY/ref=cm_cr_arp_d_pb_opt?ie=UTF8

I have tested and used these and they will work.  

Hardly a ringing endorsement 🤔

 

they worked as well as e3d… better or worse?